package com.sky.controller.user;

import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Api(tags = "C端-菜品浏览接口")
@Slf4j
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private RedisTemplate redisTemplate;

    @GetMapping("/list")
    @ApiOperation("菜品查询")
    public Result<List<DishVO>> list (Long categoryId) {
        // 动态生成key，保存菜品数据
        String key = "dish_" + categoryId;

        // 查询redis中是否存在菜品数据
        List<DishVO> list = (List<DishVO>) redisTemplate.opsForValue().get(key);


        if (list != null && list.size() > 0) {
            // 如果存在，无需查询数据库
            log.info("从redis中获取到菜品数据：{}", list);
            return Result.success(list);
        } else {
            // 如果不存在，查询数据库，将查询到的菜品数据保存到redis中，并且返回响应结果
            // 需查询已起售的菜品
            Dish dish = Dish.builder()
                    .status(StatusConstant.ENABLE)
                    .categoryId(categoryId)
                    .build();
            list = dishService.listDishWithFlavor(dish);
            // 将查询到的菜品数据保存到redis中
            redisTemplate.opsForValue().set(key, list);
            return Result.success(list);

        }

    }



}
